Antigen testing now generally refers specifically to the new crown antigen self-test method, through the antigen self-test kit self-sampling, let the sample and test paper contact, observe the results of the examination, the accuracy is higher, but there is also a certain degree of error, so in the antigen test need to ensure that the operation is accurate, the emergence of a positive result needs to be further improved the new crown nucleic acid test. Antigen test belongs to the susceptible or high-risk group can be self-tested a test. The process of taking blood or body fluid samples for testing can quickly determine whether there is a suspected infectious disease infection. To improve the efficiency of antigen detection, the procedure should be done properly. Clean the sampling site before use and try not to contaminate the sample during the test. The results can be observed by allowing sufficient contact between the sample and the reagents on the surface of the test strip, which can help to make a preliminary screening result. It is recommended that the examinee should choose antigen test or other testing methods under the guidance of a doctor, and do a good job of testing operations, if the antigen self-test results are positive, you need to go to a formal institution to improve the new crown nucleic acid test to rule out false positives.